<!DOCTYPE HTML>
<html>
<head>
	<meta charset="UTF-8">
    <title>My WebSocket test page</title>
</head>
 
<body>
    Welcome<br/>
    <input id="text" type="text"/>
    <button onclick="send()">Send</button>
    <button onclick="closeWebSocket()">Close</button>
    <div id="message"></div>
</body>
 
<script type="text/javascript">
    var websocket = null;
 
    //判断当前浏览器是否支持WebSocket
    if ('WebSocket' in window) {
    	// 端口默认为当前tomcat的端口,"cid_0001"就是后端接收的参数cid
        websocket = new WebSocket("ws://localhost:80/qfxSpringbootWebsocketServerDemo/websocket/cid_0001");
    } else {
        alert('Not support websocket')
    }
 
    //连接发生错误的回调方法
    websocket.onerror = function () {
        setMessageInnerHTML("error");
    };
 
    //连接成功建立的回调方法
    websocket.onopen = function (event) {
        setMessageInnerHTML(event.data);
    }
 
    //接收到消息的回调方法
    websocket.onmessage = function (event) {
        setMessageInnerHTML(event.data);
    }
 
    //连接关闭的回调方法
    websocket.onclose = function () {
        setMessageInnerHTML("close");
    }
 
    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
    window.onbeforeunload = function () {
        websocket.close();
    }
 
    //将消息显示在网页上
    function setMessageInnerHTML(innerHTML) {
    	if (undefined != innerHTML) {
	        document.getElementById('message').innerHTML += innerHTML + '<br/>';
		}
    }
 
    //关闭连接
    function closeWebSocket() {
        websocket.close();
    }
 
    //发送消息
    function send() {
        var message = document.getElementById('text').value;
        websocket.send(message);
    }
</script>
</html>